4T65E Overhaul Kit 2004, new and ready to install. Fits the 4T65E. Ships fast from the USA.
If your 2004 Impala, Monte Carlo, Grand Prix, LeSabre, Century, Regal, Rendezvous or Venture is slipping on the 1-2 or 2-3 shift, setting P0730 or P1811, or leaking from a tired case, this kit is for rebuilding the 4T65E you already have. It is a less-steel overhaul kit for 2004-on units: everything that wears or seals, but not the steel plates. That makes it the right choice when your steels are still flat and clean, and a cheaper one than a full master kit.
Per the listing, the kit includes all of the friction clutches, a bonded second clutch piston, a bonded third clutch piston, sealing rings, metal-clad seals, gaskets, O-rings and rubber piston seals. The frictions are made by Alto and the gasket set by Precision, two names rebuild shops use every day.
The two bonded pistons are the detail that sets this kit apart. In the 4T65E the second and third clutches are applied by molded pistons, and Transmission Digest notes that when those packs run loose the piston can cock and bind in its bore, wearing the piston and its seal early. Getting new bonded pistons in the box means the two circuits most tied to long-shift complaints get fresh apply surfaces along with new frictions.
Transmission Digest points out that a worn second clutch can show slip across second, third and fourth gears, while a third clutch problem shows up only in third. Watch your scan data for which gear the slip appears in and which adapt cells are climbing. Check the fluid and magnet too. If shifts are long but the fluid is clean, Sonnax traces many P1811 cases to a worn AFL valve bore in the channel plate rather than the clutches. Our 4T65E diagnosis guide walks through it, and the delayed engagement guide covers slow Drive and Reverse.
This kit is listed for the 2004 and later 4T65E. It is not the kit for 1997-2002 units, which use different internals, and supercharged or heavy-duty versions can use different clutch counts. Compare your old frictions and pistons to the new ones before assembly, and send us your year and VIN if you want us to confirm before you order. If your steels are blued, warped or worn smooth, choose a kit that includes them, such as the 2003-up 4T65E overhaul kit with steels. All 4T65E parts are on our 4T65E parts page.
| Fits | 4T65E 2004 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is a less-steel kit, so you reuse your original steels after inspecting them. If they are heat-damaged or warped, use a kit that includes steels instead.
All of the friction clutches, bonded second and third clutch pistons, sealing rings, metal-clad seals, gaskets, O-rings and rubber piston seals. Filter, bands, bushings and steel plates are not included.
The listing covers 2004 and later units. Earlier units, and some 2003 units, can have different input and third clutch parts. Send us your year and VIN and we will confirm the correct kit.
Loose second and third clutch packs are a common cause, because the pistons take too long to stroke. Measure clearance during assembly and correct it with thicker steels if needed. A worn AFL valve bore in the channel plate can also cause it.
Dexron VI automatic transmission fluid. Check the level hot at idle on the dipstick after the rebuild, since a dry unit takes more fluid than a routine drain and fill.
